Eng Mgr @ Optum · Founder @ Kaweah TechTulare, CA
Things I have built or led over the last twenty years, newest first.
Kaweah Tech in-house2025 - present
Signal Fire Games is a Kaweah Tech passion project. A small collection of free in-browser games for Christian youth groups. The games project onto a screen at the front of the room while a leader controls them from a phone or tablet. Bible memory drills, sword drills, the youth-group staples. No monetization. It exists to serve the community we are part of.
Optum (UnitedHealth Group)2025 - present
I lead engineering on the Manage and Receive Care platform at Optum, with five teams under me (three onshore and two offshore). The platform covers appointment management, the referral management app (which tracks active referrals for the full UHG population and adds a Quick Referrals workflow for a target set of populations), and an AI voice agent that calls providers' offices on members' behalf so they do not have to sit on hold.
Farmer's Fertilizer2025 - present
Fertilytics is a fertilizer scheduling tool I built at Kaweah Tech for Farmer's Fertilizer. Farmers upload whatever data they have on hand (spreadsheets, CSV files, PDFs, text files, the occasional scanned image of a soil test). A RAG pipeline ingests the corpus alongside Farmer's Fertilizer's product catalog and their own recommendation schedules, and an LLM produces a fertilizer schedule optimized for the products they actually stock. The farmer can add notes, concerns, or observations directly inside the app and re-generate as conditions change through the season.
Kaweah Tech in-house product2025 - present
Licentio is a licensure tracker for therapy professionals working toward state licensure. It tracks supervision hours, exam prep, application requirements, and renewal deadlines across the U.S. state boards. Launching in 2026. It is also the first Kaweah Tech product designed to earn recurring revenue on its own, rather than to serve a single client.
Automated farm-management startup (anonymized)2024
A Python and Jupyter study I built at Kaweah Tech for an early-stage automated farm-management startup. The client had a target robot in design, but most of its operating parameters had not been measured because the prototype was not finished. From the ideal-robot dimensions, we worked out the operating envelope (speeds for unloaded and loaded operation, turning radii, and the trailer tracking paths through a turn) and then used the derived envelope to plan optimal coverage on the field they were considering. The notebook walked through robot count and field suitability for the operation as the client had described it.
Optum (UnitedHealth Group)2023 - 2024
At Optum I led the team that rebuilt the provider data pipeline. The old one was a weekly file-based batch. The new one is a continuous Kafka stream. It processes 3.2 million provider updates a day, cut update latency from two weeks down to four hours, and serves provider search to about 50 million members across 1.7 million providers. We landed it a week ahead of schedule, with zero downtime, and it saves the company roughly $1.2 million a month in processing costs.
R.M. King2022 - present
The Work Order Management system I built at Kaweah Tech for R.M. King, a cotton picker head rework shop. Field reps enter work orders into phones and tablets. Orders track equipment intake, through-shop status, and customer delivery. The system has grown into Exchange, Reporting, and Partial Rework modules since the original build, and now runs shop operations across both R.M. King facilities in Fresno and Moultrie.
Keiser Corporation2018 - 2022
As Integrated Technology Manager at Keiser I led engineering on the most ambitious connected-strength platform the company ever attempted. It replaced manual pressure regulators with PWM-controlled electronic air valves, ran touchscreens off Power over Ethernet, and identified members by face and fingerprint. Rep data streamed to the cloud in real time. About a hundred test units went out to U.S. Air Force Special Forces, the U.S. Army, an Olympic training center, and a handful of other research sites.
Keiser Corporation2014 - 2016
I replaced Keiser's legacy Delphi-only iButton tooling with a JavaScript stack. I wrote the USB driver, the 1-Wire-JS protocol library, and a higher-level eChip library that handles the data structures, default values, and the fault tolerance the hardware actually needs in the field. Both libraries were open-sourced and are still published on npm. Originally built against WebUSB. Later ported to Node.js for the headless workflows.
Keiser Corporation2013 - 2017
I represented Keiser on the Bluetooth SIG Health and Fitness Working Group from 2013 through 2017. The specification I helped write became FTMS and FTMP, the GATT services that fitness equipment manufacturers now use to talk to phones and apps. The whole thing started with a briefing I gave Keiser's founder, explaining why no Bluetooth profile suitable for fitness equipment existed yet.
Keiser Corporation2013 - 2018
I co-developed the broadcast Bluetooth protocol that powers the Keiser M3i indoor cycling bike, working alongside Keiser's contracting electrical engineer. The protocol uses the three Bluetooth broadcast channels to carry real-time telemetry from as many as 254 bikes in a single class. I also built the iOS and Android companion apps, which reached around a quarter million downloads without any marketing spend behind them.
Best Buy2010 - 2012
An HTML5 plus PHP iPad app I built at Best Buy to replace the paper customer-qualification packets used by Computer, Geek Squad, Car Audio, Home Theater, and Photo. The app ran on a little server in the store's back-office closet, and the iPads pulled it down by IP. When a sales associate finished a qualification, the app printed the answers back onto the existing paper forms so nothing downstream in the operations chain had to change.